When the load
won't fit the lane.

Oversize is a dimensions problem.

The standard US trailer is 8'6" wide, 13'6" tall, and 53' long. Anything that exceeds those is oversize — even by an inch. The exact ceilings shift between states (Texas and California allow 14' tall on standard routes; the Northeast tightens to 13'6" and sometimes lower), but the principle is consistent: above the line, the load needs a permit, and the permit determines the legal route.

Oversize is separate from overweight. A wind blade is light but oversize. A transformer is compact but overweight. A refinery column is often both. We handle all three — see the heavy haul page for the weight side.

Width, height, and length thresholds.

Working thresholds we price against. Always confirm the destination state's exact ceilings with the quote.

Above superload territory, the move requires engineered routing. See superload.

The right deck for the dimension.

Equipment selection is the first cost decision on an oversize move. The trade-off is always between deck height (clears tall loads), deck length (handles long loads), and axle layout (carries the weight).

• Step-deck
  11’ well clears tall loads that overshoot a flatbed’s 13’6” ceiling. The first call for tall machinery and prefab structures.
• Stretch / extendable flatbed
  50’–80’ deck for over-length cargo — wind blades, beams, bridge sections, pole-line components.
• RGN (removable gooseneck)
  Drive-on for tracked equipment that’s tall enough to need step-deck clearance but heavy enough to need RGN articulation.
• Specialized wide-load flatbed
  Reinforced side rails for loads above 12’ wide. The trailer width itself stays standard; the load overhangs.

Escort requirements for oversize.

Width and height are the dominant escort triggers on oversize moves. Length matters too, but most state rules read width first.

• Single rear pilot car
  Width 12’–14’, or length above 90’–110’ depending on state.
• Front + rear pilot cars
  Width 14’–16’, or height above 14’6” on metro routes.
• Height pole car
  Mounted with a pole at the load’s exact height — clears overhead obstructions in real time. Required on most state routes above 15’.
• Police escort
  Width above 16’, or certain bridge crossings, or specific high-traffic urban segments.

When you can actually move it.

Most states restrict oversize movement to daylight, weekday, non-holiday hours. Some tighten further: no movement during peak commuter windows, no movement on holiday weekends, no movement above certain weather conditions (rain, fog, ice). Wide loads frequently get the tightest windows — California restricts wide moves to off-peak times on the I-5 corridor; Pennsylvania bans most oversize movement on Sundays.

Travel windows compound the transit estimate. A Houston-to-Calgary oversize move on a 5-state route can take 7–10 days door to door, including overnight stops because the permit doesn't let the load roll at night. We build this into the quote — no surprises on the timeline.

Route surveys and clearance math.

Above 14' tall, every overhead obstruction on the route gets checked — bridges, traffic signals, sign gantries, overhead wires, gas-station canopies. Above 16' wide, the road profile gets reviewed — shoulder grades, lane shifts, signal arms. A route survey is the physical version of that check. For in-pattern moves we work with surveyed routes we already know clear; for one-off engineered routes we partner with surveyors and DOT route planners on both sides of the move.

The survey output is the legal route — deviation isn't optional and trips the permit. AI front-loads the math; the surveyor and the carrier confirm the line on the ground.

Frequently asked.